/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package edu.uci.jforests.util;

/**
 * @author Yasser Ganjisaffar <ganjisaffar at gmail dot com>
 */

public class FloatingPointUtil {
	
	// The small deviation allowed in double comparisons
	public static double SMALL = 1e-6;

	public static boolean lessThanOrEqual(double a, double b) {
		return (a - b < SMALL);
	}

	public static boolean greaterThanOrEqual(double a, double b) {
		return (b - a < SMALL);
	}

	public static boolean lessThan(double a, double b) {
		return (b - a > SMALL);
	}

	public static boolean greaterThan(double a, double b) {
		return (a - b > SMALL);
	}
	
	public static boolean equal(double a, double b) {
		return (a - b < SMALL) && (b - a < SMALL);
	}
	
	public static boolean equal(double a, double b, double epsilon) {
		return (a - b < epsilon) && (b - a < epsilon);
	}
}
